AISI 1215 Free cutting steel | GB Y15 | SUM24L steel
AISI /ASTM 1215 (also known as Y15 or SUM24L) is a low-carbon cutting steel mainly used in the manufacturing of parts that are easy to cut. The characteristics and application of this type of steel are as follows:
Chemical composition of 1215 free cutting steel:
The carbon (C) content is relatively low, usually between 0.12% and 0.18%, which helps to improve the ductility and processability of the material.
Containing high amounts of sulfur (S) and phosphorus (P), although usually considered impurities, these two elements are intentionally added to 1215 steel because they can form sulfide and oxide inclusions, thereby playing a role in chip breaking and tool lubrication during cutting, reducing cutting resistance, and improving machining efficiency.
It may also contain other alloying elements such as manganese (Mn) and silicon (Si) to adjust the mechanical properties and processing characteristics of the material.
AISI 1215 free cutting steel Mechanical properties:
Due to its main design purpose of facilitating cutting, 1215 steel has relatively low strength and hardness, but good ductility and toughness.
Suitable for cold forming processing, such as cold drawing, cold extrusion, etc.
AISI 215 steel Application areas:
Widely used for parts that require a large amount of cutting processing, such as screws, nuts, shafts, pins, small gears, fasteners, and other standard parts.
Suitable for automatic lathes and mass-produced parts, as it can improve production efficiency and reduce tool wear.
matters needing attention:
Although easy to cut, the corrosion resistance of 1215 steel is relatively poor due to the addition of sulfur and phosphorus, making it unsuitable for applications that require high corrosion resistance.
After use, heat treatment (such as annealing) is generally required to eliminate work hardening, restore the mechanical properties and processability of the material.
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